It was announced at this year's Sanrio Expo that Sanrio's most popular cat, Hello Kitty will collaborate with Kamen Rider 555 for the show's 15th anniversary.
This collaboration includes various goods, which features Hello Kitty dressed up as the Kamen Riders and Orphnoch monsters from the series. Some of these goods include tote bags, shirts, and keychains based on the following characters: Kamen Rider Faiz, Kamen Rider Kaixa, Kamen Rider Delta, Horse Orphnoch, Wolf Orphnoch, Spider Orphnoch, Snake Orphnoch, Arch Orphnoch, and Dragon Orphnoch.
The actors who played the heroes of the series, Kento Handa (Takumi Inui/Kamen Rider Faiz) and Kouhei Murakami (Masato Kusaka/Kamen Rider Kaixa) also appeared in the event as well dressed up as their characters wearing Hello Kitty shirts. Handa is positive about the collaboration and mentions that he likes Hello Kitty and that there are goods in his house. As for Murakami, he stats that he thought the toys are cute and the designs are good for both men and women to wear. The actors also transformed on-stage with Hello Kitty and posed for the audience.